Electronics Forum | Thu Jun 12 04:54:45 EDT 2003 | ronih
I need active solder paste to overcome solderability problems - I believe it have to be washed out, the issue is not the cleaning process only the paste (flux) activity level.
Electronics Forum | Tue Jul 08 20:47:38 EDT 2003 | davef
Sam: If your gold overcoat was pourous, the nickel undercoat would corrode prior to your attempting to solder and you would not be able to solder without an aggressive flux. Since you see solder flow and wetting, it indicates the gold did an adequat
Electronics Forum | Thu Jul 17 12:08:56 EDT 2003 | russ
The only way I have been able to do it so far is to apply a very agressive flux and then wave the board and then wick all of the pads. (Totaly S#$KS). I trust you will eliminate this finish in the future? I hate tin for this reason. Russ
Electronics Forum | Fri Jul 18 11:05:07 EDT 2003 | davef
A highly activated flux will begin to corrode the imm tin coating after 10 minutes. Corroded tin has poor solderability.
Electronics Forum | Fri Aug 01 12:35:54 EDT 2003 | blnorman
Kester recommends that we store our 1400 gm tubes on the tip. Our documentation is based on their recommendation. The Alpha past we used was stored horizontally, but that was because the flux readily separated from the metal.
Electronics Forum | Fri Aug 01 23:43:52 EDT 2003 | Yngwie
Thanks Dave, the residue appeared to be similar to fungus. First, I thought it could come from water soluble flux but, our plant only runs no-clean. So, can I concluded that this greenish "fungus" looking staff is not initiated from high hot air temp
Electronics Forum | Fri Aug 22 09:44:45 EDT 2003 | davef
Kenny: Since you need to use water soluable flux and can't use no-clean, consider asking your board fabricator to plug the via.
Electronics Forum | Tue Aug 26 21:12:24 EDT 2003 | iman
depends if your water wash process is manual or automation? important is the water residue inside the via holes is adequately blown out. As long as the water-flux residue is out, testing down the line should not be a issue, at least from theory and o
Electronics Forum | Thu Sep 04 16:43:00 EDT 2003 | coeps
I have never used Manganin wire. I understand it is difficult to solder. Should we use a move active flux. It will be a .25mm, PTFE insulated manganin wire spliced to thermistor wires. Thanks coeps
Electronics Forum | Tue Oct 21 10:59:49 EDT 2003 | AXL
Hey Russ I hate to say it but you switched from Indium for no reason! If you were getting residue then your oven profile was off! Your flux should have burned off if it was done correctly, that's the purpose of "no-clean".
